FWIW I flatten the housing & end cover, and seal with a VERY LIGHT wipe of loctite threadlocker on the sealing surfaces.
I'm thinking that the stock pump should make better pressure than it is, even if it is bleeding off a bit more by the cam bores...
Glen
--Previous Message--
: I had the same thought... the pump just
: can't keep up at idle as if it were
: drawing air.
:
: While making the pump body spacer I was
: comparing the oil passages for the
: suction side. There is a curious fluid
: path. The oil is drawn p the pickup
: tube all the way to the top of the pump
: body. There the oil makes a 180 degree
: turn and is drawn back down to the head
: with the pickup tube. On the pump head
: there is a horizontal channel that the
: oil must be drawn through. That
: channel is ridiculously narrow/small.
: The narrow point on that channel is
: 1/4" wide and a bit over
: 3/16" deep. That's the equivalent
: area of a 1/4" diameter hole.
: Seeing as how pumps push better than
: pull... that tiny passage just sounds
: like an awful flow restriction.
:
: The pump head that I measured this on
: is the older straight pickup design but
: I assume the angled head would have the
: same restriction. If it does...
: when/if I install this pump on the
: engine I am considering undercutting
: the pump head (without disturbing the
: surfaces the rotors seal against) to
: enlarge the flow path into the pump to
: be as large as practical. I'll post
: pictures later showing what I am
: talking about.
:
: Doug L.
:
:
: --Previous Message--
: Hmmm that doesn't sound good, it's
: really
: having to work to make pressure.
: Another consideration would be the oil
: pump itself not making enough pressure,
: due to a suction or pressure leak.
: Glen
:
:
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